Byron boahdman



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BYRON BOAl-DMAN, OF NORWIOH, CONNECTICUT, ASSIGNOR T() HIMSELF AND FRANK DOUGLAS, OF `SAME PLAGE.

Letters Patent' No. 76,983, dated Apr-Z 21,1868.

IMPROVEMENT IN DEVICE EOE TURNING NUT-S.

TO ALL WHOM IT MAY CONOERN:

Be it known that I, BYRON BOARDMAN, of Norwlelncounty of New London, invented n new :ind improved Arbor for Turning:r Nuts; und I do yhereby declare that the following is a full, clenr, and exact description of the construction and operation of the saine, reference being had to the annexed drawings, making a part of this specification, inwhieh- Figure 1 is a perspective View of the adjustable ring.

L.' is a longitudinal view of improved arbor, with adjustable ring and nut on it.

Figure 3 is a longitudinal view of an ordina-ry arbor, with nut'on it.

Figure 4 is :t longitudinal view of improved arbor, without ring or nut on it.

Figure 5 is a longitudinal view of au' ordinary'arbor, without a. nut on it.

Similar let-ters of reference indicate corresponding parts of all the figures. y

The nature of my invention consists in providing a loose 'ring with two projections on each of its sides, at right angles with euch other, and which is placed on the screw-arbor between its shoulder and the nut to be turned, where it adapts itself` to the irregular shape of a, rough er crooked nut, and makes the pressure directly endwise with the arbor, and perfectly truc with the thread.

Adj'ustdblc ring A, tig. 1, is provided with rounded projections B B B1B, two of which stand directly opposite eachother on the saure side, und Screreurbor C, figs. 2 and 4, is made with greater number of threads, to act-as a. bearing for the nut, and `also made i'ullfsitc of outsidicef thread at the shoulder E, lfor greater strength of arbor. Arbor D, figs. 3 and 5, is the kind 'new itt use, :1nd has to be shouldered-down below the bottom ci' the thread, at F, to allow nut G to'.

' lscrew upto its shoulder, und when the highest point of, nut Gr strikes one side of shoulder, as at H, fig. 3, and

is screwed 'up hard enough to turn or f'aeo up thc nut, arbor D will spring at'F, or the nut will cramp on the few `remaining threads that hold it, s'o that it will be nearly as much out ot' truc with the thread when faced up as before it was turned. i

The-operation ot' my improvement is as follows: Ring'A is placed on arbor C, outside of whichpnut I is screwed on thread J, with athread bearingthe whole length ofthe nut; and when nut I strikes against projec' tions B B of ring A, it tilts on projections B B, when incontnct with the shoulder of the arbor at K, and thereby holds the nut firmly in direct line with rthe thread.

What I claim, and desire to secure by Letters Potent, is-

I. The adjustable ring A, with projections B B B B, when used for the purpose specified.

2. vThe combination of' arbor C with ring A, substantially as herein specified.

BYRON BOARDMAN.

Witnesses: l

ALBERT S. Bormes, FRANK DOUGLAS.

directly at right angles to them on the other or opposite side of ring.v

and Stateof Connecticut, have i 

